Attach the quick connect hose to device until you hear/feel a "click."
Press and hold the power button for 3 seconds.
Select the Car setting on the device.
Pre-set PSI with +/- (see driver door jam).
Screw the hose into the tire valve stem.
Quick press the power button to start. Device will auto stop on pre-set PSI.
Hold the power button for 3 seconds to power off.